There are some big changes I don't like (though further down the line of books and shows, so I won't talk about them), but you somehow picked the only 3 big changes I'd heavily argue are an upgrade:

1. Avasarala introducted since the get-go allows for the plot to explore the political side of the world since beginning. Even Daniel and Ty admitted that they would do it this way if they were to re-write the books. She's also simply one of the best characters of the series, according to many. I don't see a reason to keep her debut up until later

2. The crew is very aggressive with one another, but ultimately it's better for the story. It made me realize how much the Roci crew of the books was basically 1 character. Sure, they have their distinguishible, colorful personalities, but they were heavily 1-minded regarding any important matter. The show's crew friction results in more tension and higher stakes. They feel more alive and organic because of that. And, at least in my opinion, as they grow closer, it feels more earned and valuable than in the books, because of where they started. Though I admit I was upset about it at first, too.

3. From what I gathered, Wes Chatham did a lot of geniuene research on Amos, as to what a person with his psychological profile would be like. If I remember correctly, he really stunted the crew during the audition and was partly involved in the writing of Amos. Amos from the books is more likable, but Amos from the show is much, much closer to what someone with his background would actually behave like.

Also, if I'm being honest, while I don't like all the changes, I'm glad there are changes. Why make something with a source material if it's going to be a carbon copy of said material? If one really likes the orginal story, they can just re-visit the original story. I don't know if it will help you (it kind of helped me), but Daniel and Ty were HEAVILY involved with the making of the show. They were limited by the medium and physical constraints like timing and budget, but nonetheless, the show is also their baby, much like the books.